Sofa



FIG. 1 is a front perspective view of a sofa showing our new design;

FIG. 2 is a left side elevational view thereof, the right side being a mirror image thereof;

FIG. 3 is front elevational view thereof;

FIG. 4 is a rear elevational view thereof; and,

FIG. 5 is a rear perspective view thereof.

The bottom view is not ornamental. 

CLAIM The ornamental design for a sofa, as shown and described. 